PHP----CSV文件处理类

class csv
{
public $csv_array; //csv数组数据
public $csv_str;  //csv文件数据

public function __construct($param_arr, $column)
{
$this->csv_array = $param_arr;
$this->path = $path;
$this->column = $column;
}

/**
* 导出
* */
public function export()
{
if (empty($this->csv_array) || empty($this->column)) {
return false;
}
$param_arr = $this->csv_array;
unset($this->csv_array);
$export_str = implode(',', $param_arr['nav']) . "\n";
unset($param_arr['nav']);
//组装数据
foreach ($param_arr as $k => $v) {
foreach ($v as $k1 => $v1) {
$export_str .= implode(',', $v1) . "\n";
}
}
//将$export_str导出
header("Cache-Control: public");
header("Pragma: public");
header("Content-type:application/vnd.ms-excel");
header("Content-Disposition:attachment;filename=txxx.csv");
header('Content-Type:APPLICATION/OCTET-STREAM');
ob_start();
//  $file_str=  iconv("utf-8",'gbk',$export_str);
ob_end_clean();
echo $export_str;
}

/**
* 导入
* */
public function import($path, $column = 3)
{
$flag = flase;
$code = 0;
$msg = '未处理';
$filesize = 1; //1MB
$maxsize = $filesize * 1024 * 1024;
$max_column = 1000;

//检测文件是否存在
if ($flag === flase) {
if (!file_exists($path)) {
$msg = '文件不存在';
$flag = true;
}
}
//检测文件格式
if ($flag === flase) {
$ext = preg_replace("/.*.([^.]+)/", "$1", $path);
if ($ext != 'csv') {
$msg = '只能导入CSV格式文件';
$flag = true;
}
}

//检测文件大小
if ($flag === flase) {
if (filesize($path) > $maxsize) {
$msg = '导入的文件不得超过' . $maxsize . 'B文件';
$flag = true;
}
}

//读取文件
if ($flag == flase) {
$row = 0;
$handle = fopen($path, 'r');
$dataArray = array();
while ($data = fgetcsv($handle, $max_column, ",")) {
$num = count($data);
if ($num < $column) {
$msg = '文件不符合规格真实有：' . $num . '列数据';
$flag = true;
break;
}

if ($flag === flase) {
for ($i = 0; $i < 3; $i++) {
if ($row == 0) {
break;
}
//组建数据
$dataArray[$row][$i] = $data[$i];
}
}
$row++;
}
}

return $dataArray;
}
}

$param_arr = array(
'nav' => array('用户名', '密码', '邮箱'),
array(0 => array('aaa', '123456', 'aaa@yahoo.com'),
1 => array('bbb', '213456', 'bbb@yahoo.com'),
2 => array('ccc', '123456', 'ccc@yahoo.com')
));

$column = 3;
$csv = new Csv($param_arr, $column);
$csv->export(); //下载

$path = 'd:/tmp.csv';
$import_arr = $csv->import($path, 3);